Lead Wires / Cable: Temperature Range -200°C to +1000°C

Component Specifications

Definition

Lead wires and cables are essential components in temperature sensor assemblies that provide electrical connectivity between the temperature sensing element (such as RTD, thermocouple, or thermistor) and the measurement or control instrumentation. These components must maintain signal integrity while withstanding the environmental conditions of the application, including temperature extremes, chemical exposure, mechanical stress, and electromagnetic interference.

Working Principle

Lead wires and cables function as conductive pathways that carry low-voltage electrical signals generated by temperature sensing elements. They maintain signal accuracy by minimizing resistance, preventing signal degradation from noise or interference, and ensuring stable electrical characteristics across the operating temperature range. Proper insulation and shielding protect against environmental factors that could compromise measurement precision.

Materials

Conductor: Tinned copper, nickel-plated copper, or alloy wires (e.g., Constantan, Chromel, Alumel for thermocouples). Insulation: PTFE (Teflon), FEP, PFA, silicone rubber, fiberglass, or ceramic beads for high-temperature applications. Sheath/Jacket: Stainless steel braiding, PVC, polyurethane, or thermoplastic elastomers. Shielding: Copper or aluminum foil with drain wire, or braided shielding for EMI/RFI protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bend Radius	5x cable diameter minimum
Conductor Size	AWG 20 to 30
Voltage Rating	300V to 600V
Temperature Range	-200°C to +1000°C
Insulation Resistance	>100 MΩ at 500V DC

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 80601-2-56, DIN 43735, IEC 60584

Parent Products

This component is used in the following industrial products

Temperature Sensors

Temperature sensors measure and monitor temperature within the Sterilization Zone to ensure precise thermal control during sterilization processes.

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Engineering Analysis

Risks & Mitigation

Signal degradation from poor connections
Insulation breakdown at high temperatures
EMI/RFI interference affecting accuracy
Mechanical damage from vibration or abrasion

FMEA Triads

Trigger: Incorrect wire type for thermocouple application
Failure: Measurement errors due to incorrect thermoelectric voltage
Mitigation: Use matched extension wires or compensating cables specified for the thermocouple type (e.g., Type K, J, T)

Trigger: Inadequate shielding in electrically noisy environments
Failure: Signal noise and inaccurate temperature readings
Mitigation: Implement double shielding (foil + braid) and proper grounding techniques

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±1.5°C or ±0.4% of reading (whichever is greater) for standard industrial applications

Test Method

ASTM E230/E230M for thermoelectric properties, IEC 60068 for environmental testing, UL 758 for appliance wiring material

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Lead Wires / Cable

Manufacturer profiles associated with Lead Wires / Cable.

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Frequently Asked Questions

What is the difference between thermocouple extension wire and compensating cable?

Thermocouple extension wire matches the thermocouple alloy composition and is used to extend the sensor to the instrument over longer distances while maintaining accuracy. Compensating cable uses different, less expensive alloys that mimic the thermoelectric properties of the thermocouple within a limited temperature range, typically for connections near ambient conditions.

How do I select the right insulation material for high-temperature applications?

For temperatures above 200°C, use PTFE, FEP, or ceramic insulation. PTFE handles up to 260°C continuously, while ceramic-insulated wires can withstand over 1000°C. Consider chemical resistance, flexibility, and abrasion resistance alongside temperature rating.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Lead Wires / Cable